Number of customer reviews: 3923
Average rating: 4.5/5
Many experts we've talked to recommend castor oil to aid lash and eyebrow growth, but word on Amazon is that the special oil can also work hair growth wonders on top of the scalp.
"I am now a fan of castor oil!" one Amazon reviewer practically shouts. "I've always read that castor oil was great for hair growth, so I decided to give it a try. I’ve been using it on my eyebrows, lashes, and on my hair (my hair is natural, veryyyyy curly, and colored), and in a month, I can already tell a difference. My eyebrows seem much thicker, my hair is so soft, thick, and healthy. My lashes are looking thicker and longer. I also use this on my skin."
This exact castor oil is currently sold out, but you'll find hundreds of other options on Amazon right now.